agromopa.blogg.se - Structure of heart download free

This organ circul ates blood through the circulatory system's blood vessels. Defined by branch that gives rise to posterior interventricular a.The heart is a muscular organ.Left anterior descending (LAD) or anterior interventricular a.

Originates from ostia in left aortic sinus.

Right marginal arteries (acute marginal aa).

Originates from ostia in right aortic sinus.

Just superior to right and left cusps in the Sinus of Valsalva are the openings of the right and left coronary arteries, respectively.

Helps to dampen aortic outflow and prevent cusps from adhering to walls of aorta.

Just superior lies the Sinus of Valsalva.

Usually a greater number than the right, due to the increased pressures and strength necessary to prevent regurgutation.

Contract to prevent Tricuspid valve regurgitation.

Connected to cusps via Chordae tendinae.

Anterior/Posterior/Septal cusps (leafs).

Prevents backflow into coronary sinus during atrial systole.

Incompetent in adult, directs IVC blood though Foramen ovale in fetus.

Ligamentum arteriosum Left recurrent laryngeal n.Ĭhambers Right atrium Right ventricle Left atrium Left ventricle Valves Leaflet valves Tricuspid Bicuspid (mitral) Cusped (semilunar) valves Aortic Pulmonic Heart Features

Identification point for Left recurrent laryngeal nerve.

Attaches aortic arch superiorly to pulmonary trunk/left pulmonary artery inferiorly.

Remnant of embryonic ductus arteriosus.

Begins/ends at T4/T5 or sternal angle level.

Transverse pericardial sinus Oblique pericardial sinus

Originates anterior to the aorta from right ventricle.

Mediastinum Mediastinum Superior Inferior Anterior Middle Posterior Heart

Base is superior near origins of great vessels.

Apex points inferiosinister (down and left).